You have just over a month to file your taxes, unless you file an extension, of course, which means it’s time to collect your stray W-2s and 1099s, grab a cup of coffee and get to work (or head to your tax preparer’s office).

Whether you’re looking for the best, free software or need to know what to do if you haven’t filed years, we’ve got you covered.

Taxes are due April 17 this year, and you’ll likely get your return within 21 days of filing if you do so electronically. Use the IRS’s IRS2Go app or its online refund tool to see where your refund is. To see your tax bracket for 2017, check out these tables from the Tax Foundation. And remember: The new tax brackets, standard deduction and most of the other changes from the GOP tax bill take effect next tax season, for 2018. This year, most of the old rules still apply, as you’re filing your taxes for 2017.

There are a number of ways to file your taxes: You can print out the forms (usually, form 1040) and mail them to the IRS, which leaves you more susceptible to scammers as they take longer to process; use tax-filing software; or see a tax preparer. Here’s the information you’ll need for each. If you earn less than $66,000 per year, you have access to free tax filing software.

There are a ton of scammers out there, and tax season is when some shift into high gear. Watch out for suspicious calls, emails and even messages on social media. If you receive a call threatening to send you to jail, it’s a scam. Elderly people and non-native English speakers are especially vulnerable.

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Another scam to watch out for: Getting your return swiped, particularly in a post-Equifax hack world. One of the many ways your money can get stolen is by fraudsters using your Social Security number to file on your behalf. Experts advised people to file their tax return earlier this year to lower the chances of fraud, so if you haven’t yet, don’t wait until the last minute.

You’ll need to learn the difference between tax deductions and tax credits, and your marginal tax bracket, and then do some math: “Multiply the actual amount of the deduction (considering the percentage cap) by your marginal tax bracket.” For example, if your marginal tax bracket is 25 percent, you’ll save 25 cents in federal income taxes for every dollar you claim as a deductible business expense. “If you have a $100 deduction, you would save $25. If you write off a $50 business meal, you would save about 6 bucks. ($50/2 x 0.25).”

If you sold cryptocurrency (which the IRS views as property) last year and made a profit, it’s subject to capital gains tax. It’ll count as a short-term gain if you held it for one year or less, and it will be taxed as ordinary income, meaning you’ll be taxed 10 percent to 39.6 percent, depending on your 2017 tax bracket. If you held it longer than a year before you sold it, it’s a long-term gain, meaning you’ll be taxed zero percent to 20 percent, depending on your income.

If you’re getting a refund, then there’s no penalty for missing the tax deadline (keep in mind, you only have three years to claim it). Not paying your taxes is a misdeamenor, but the IRS would likely rather collect the money than send you to jail. There is a penalty, though: You’ll be charged five percent per month on what you owe, up to a maximum of 25 percent after five months.

Congrats! You’ve completed your taxes this year. But you’re not quite done yet—you’ll need to hold onto your paperwork for at least seven years, in case the IRS audits you. And you should hold on to your tax returns, with proof that you filed and paid, if you owed, and any forms you filed contributions to an IRA or Roth conversion indefinitely.